Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Patent
1977-05-03
1978-09-12
Dahl, Lawrence J.
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
315403, 330263, 330265, H03F 326
Patent
active
041141091
ABSTRACT:
An amplifier circuit suitable for use as a video amplifier in a color television circuit for driving the variable impedance load provided by a color television picture tube, in which the load impedance of the amplifier element of the circuit is also made variable. This is achieved, in one embodiment by using as the output stage of the amplifier two transistors with a complementary symmetrical configuration so that one is always substantially cut-off while the other conducts. In another embodiment a transistor in common collector configuration acts as the amplifier element and its emitter from which the output of the amplifier is taken is connected by a diode to the collector of a transistor which feeds the base of the common collector transistor.
REFERENCES:
patent: 2666818 (1954-01-01), Shockley
patent: 2933692 (1960-04-01), Meyers
patent: 3995114 (1976-11-01), Marschinke
Dahl Lawrence J.
Indesit Industria Elettrodomestici Italiana S.p.A.
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